drivers/iio/magnetometer/st_magn_i2c.c

   1 /*
   2  * STMicroelectronics magnetometers driver
   3  *
   4  * Copyright 2012-2013 STMicroelectronics Inc.
   5  *
   6  * Denis Ciocca <denis.ciocca@st.com>
   7  *
   8  * Licensed under the GPL-2.
   9  */
  10
  11 #include <linux/kernel.h>
  12 #include <linux/module.h>
  13 #include <linux/slab.h>
  14 #include <linux/i2c.h>
  15 #include <linux/iio/iio.h>
  16
  17 #include <linux/iio/common/st_sensors.h>
  18 #include <linux/iio/common/st_sensors_i2c.h>
  19 #include "st_magn.h"
  20
  21 #ifdef CONFIG_OF
  22 static const struct of_device_id st_magn_of_match[] = {
  23         {
  24                 .compatible = "st,lsm303dlh-magn",
  25                 .data = LSM303DLH_MAGN_DEV_NAME,
  26         },
  27         {
  28                 .compatible = "st,lsm303dlhc-magn",
  29                 .data = LSM303DLHC_MAGN_DEV_NAME,
  30         },
  31         {
  32                 .compatible = "st,lsm303dlm-magn",
  33                 .data = LSM303DLM_MAGN_DEV_NAME,
  34         },
  35         {
  36                 .compatible = "st,lis3mdl-magn",
  37                 .data = LIS3MDL_MAGN_DEV_NAME,
  38         },
  39         {
  40                 .compatible = "st,lsm303agr-magn",
  41                 .data = LSM303AGR_MAGN_DEV_NAME,
  42         },
  43         {
  44                 .compatible = "st,lis2mdl",
  45                 .data = LIS2MDL_MAGN_DEV_NAME,
  46         },
  47         {},
  48 };
  49 MODULE_DEVICE_TABLE(of, st_magn_of_match);
  50 #else
  51 #define st_magn_of_match NULL
  52 #endif
  53
  54 static int st_magn_i2c_probe(struct i2c_client *client,
  55                                                 const struct i2c_device_id *id)
  56 {
  57         struct iio_dev *indio_dev;
  58         struct st_sensor_data *mdata;
  59         int err;
  60
  61         indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*mdata));
  62         if (!indio_dev)
  63                 return -ENOMEM;
  64
  65         mdata = iio_priv(indio_dev);
  66         st_sensors_of_name_probe(&client->dev, st_magn_of_match,
  67                                  client->name, sizeof(client->name));
  68
  69         st_sensors_i2c_configure(indio_dev, client, mdata);
  70
  71         err = st_magn_common_probe(indio_dev);
  72         if (err < 0)
  73                 return err;
  74
  75         return 0;
  76 }
  77
  78 static int st_magn_i2c_remove(struct i2c_client *client)
  79 {
  80         struct iio_dev *indio_dev = i2c_get_clientdata(client);
  81         st_magn_common_remove(indio_dev);
  82
  83         return 0;
  84 }
  85
  86 static const struct i2c_device_id st_magn_id_table[] = {
  87         { LSM303DLH_MAGN_DEV_NAME },
  88         { LSM303DLHC_MAGN_DEV_NAME },
  89         { LSM303DLM_MAGN_DEV_NAME },
  90         { LIS3MDL_MAGN_DEV_NAME },
  91         { LSM303AGR_MAGN_DEV_NAME },
  92         { LIS2MDL_MAGN_DEV_NAME },
  93         {},
  94 };
  95 MODULE_DEVICE_TABLE(i2c, st_magn_id_table);
  96
  97 static struct i2c_driver st_magn_driver = {
  98         .driver = {
  99                 .name = "st-magn-i2c",
 100                 .of_match_table = of_match_ptr(st_magn_of_match),
 101         },
 102         .probe = st_magn_i2c_probe,
 103         .remove = st_magn_i2c_remove,
 104         .id_table = st_magn_id_table,
 105 };
 106 module_i2c_driver(st_magn_driver);
 107
 108 MODULE_AUTHOR("Denis Ciocca <denis.ciocca@st.com>");
 109 MODULE_DESCRIPTION("STMicroelectronics magnetometers i2c driver");
 110 MODULE_LICENSE("GPL v2");